Apparatus for forming concrete piles.



T. W. RIDLEY. APPARATUS FOR FORMING CONCRETE FILES.

APPLIOATION FILED JAN. 13, 1914.

Patented June 30,1914.

COLUMBIA PLANOURAPH COHWASHINUTON, n. c.

UNTTETE STAT PTE FFTQ.

APPARATUS FOR FORMING CONCRETE FILES.

Application filed January 13, 1914.

To all whom it may concern Be it known that I, THOMAS l/VILLIAM BIDLEY,a subject of the King of Great Britain, residing at 67 Marton road,Middlesbrough, in the county of York, Eng land, have invented new anduseful Improvements in Apparatus for Forming Concrete Piles, of whichthe following is a specification.

Concrete piles are commonly formed by first driving a tubularpreparatory pile fill ing it with concrete and then withdrawing itleaving the concrete in place and it has also been proposed to force theconcrete down the preparatory pile by means of a rannner. According tothis invention the ranimer is operated by a screw and nut. Preferablythe top of the screw has fixed to it a worm wheel gearing with a wormrevolving in bearings carried by the center pivot of the toggle leverarrangement described in the specification of the United States PatentNo. 1,078,000, the worm having fixed to it a chain wheel which isrevolved by an endless chain. The stem of the rammer is hollow and hasat its top a split nut in which the screw works. When the lower end ofthe screw reaches the nut the latter is opened and the rammer is eitherlifted to introduce more concrete into the preparatory pile or else alength is added to the stem of the rammer the nut being thus againraised to the top of the screw.

Figure 1 is a sectional elevation of the ap paratus. Fig. 2 is ahorizontal section of the split nut and its box on alarger scale. Fig. 3is a sectional elevation showing the cam grooves for operating the splitnut.

(ll is the tubular preparatory pile, o is the concrete within it and cis the raininer.

(Z is a split nut contain-ed in a box 0 at the top of the rammer.

f is a screw working in the nut and g is a worm wheel fixed to the topof the screw.

7b is a worm gearing with the worm wheel and revolving in hearings in aframe fixed to the short link 70.

Z is a chain wheel fixed to the worm and m is an endless chain by whichit can be re volved. The bottom of the link it rests on the top of thescrew f and takes its thrust while its upper end is pivoted to one endof Specification of Letters Patent.

Patented June 3%, 191st. Serial No. 811,925.

the links a whose other ends are connected by the links 0 and 7] to thelifting chain Q and to the preparatory pile a. When the chain Q ishauled up to withdraw the preparatory pile then as described in theformer specification the link connections force the rammer c downwardand this downward moven'ient of the rannner can according to the presentinvention be increased or diminished by turning the chain wheel Z. Thehalves of the split nut (Z have fixed to them pins 1" which engage withcam grooves s in the ends of a strap t so that by giving the strap aquarter turn the halves of the nut are separated.

lVhat I claim is l. The combination of a preparatory pile, a rammerinside the pile, a nut and screw,

.connections between the nut and screw and the pile and rammer, andmeans for turning the nut and screw relatively to each other tosimultaneously draw the pile upward and force the rammer downward.

2. The combination of a preparatory pile, means for withdrawing it, arammer, means operated by the act of withdrawal for actuating the rammerand independently operated adjusting means for varying the motion of therainmer.

3. The combination of a preparatory pile, a rammer, a lifting chain,toggle link connections between the chain, the pile and the rammer, anut and screw in the connections and means for turning the nut and screwrelatively to each other.

at. The combination of a preparatmry pile, a rammer, a lifting chain,two pairs of links, the links of each pair being pivoted to gether atone end while their other ends are pivoted respectively to thepreparatory pile and to the lifting chain, a third pair of links pivotedtogether and to the pivots connecting the links of the first pairs, aworm wheel carried by the pivot connecting the links of the third pair,a worm wheel gearing with the worm, a screw fixed to the worm wheel anda nut carried by the ranr mer and engaging with the screw.

THOMAS XVILLTAM RIDLEY. Witnesses LLOYD B. WRIGHT,

T. K. G. RIDLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of ratents,

Washington, D. 0.

